Interface Level

Parameters

pointer to the sockaddr structure in which to store the address of the next hop. If this information is not required, the value NULL may be passed instead.

Description

The net_routeto() function indicates which network interface packets destined for a particular address would be sent out of, according to the systems network routing tables. If next is supplied as a non-NULL pointer, the IP address
of the nexthop router to be used is returned in it.

Return Values

The net_routeto() function returns:

–1

The network protocol does not support this function.

0

This function cannot find a route for the address given.

>0

Indicates which network interface can be used to reach the given address.

Context

The net_routeto() function may be called from user, kernel, or interrupt context.